Some video game weapons are unrealistic. Some are actually downright sane (in a steampunk-ish sort of way). Games Radar looks at some that have real-life analogues. Take lasers for instance:

However, technology has been coming on leaps and bounds in recent years, and the US military is working with Boeing to create a truck-based anti-air laser and an apparently terrifyingly precise gunship mounted sniping laser weighing around 40,000 lbs. The former is scheduled for battle-strength demonstration in around two years time and the latter was successfully tested this very month.

In a real-life deathmatch:

You?d do pretty well as long as you didn?t mind circle-strafing really slowly in a 35-ton truck.